Brian Samuel Epstein ( /ˈɛpstaɪn/; 19 September 1934 – 27 August 1967), was an English music entrepreneur; best known for being the manager of The Beatles, until his death. He also managed many other musical artists, such as Gerry & the Pacemakers, Billy J. Kramer and The Dakotas, Cilla Black, The Remo Four, and The Cyrkle. His management company was named NEMS Enterprises after his family's music stores, also called NEMS (North End Music Stores).

Epstein paid for The Beatles to record a demonstration tape in Decca's London studios, which resulted in Decca declining to sign the group to a contract. After approaching nearly all all the major recording companies and recording producers in London and being rejected, Epstein managed to secure an EMI recording contract under threat of withdrawing the sale of EMI's records at his NEMS music stores. NEMS was one of the biggest musical retail outlets in the North of England. Record producer George Martin offered a contract on behalf of EMI's small Parlophone label, only when informed of the economic threat to EMI by Epstein.

Murray Kaufman (February 14, 1922 – February 21, 1982), professionally known as Murray the K, was an influential rock and roll impresario and disc jockey of the 1950s, 1960s and 1970s. During the early days of Beatlemania, he frequently referred to himself as the fifth Beatle.

Murray Kaufman came from a show business family: his mother, Jean, played piano in vaudeville and wrote music and his aunt was a character actress on the stage and in film. He was a child actor - an extra - in several 1930s Hollywood films. He attended a military boarding school, and later was inducted into the United States Army where he arranged entertainment for the troops. Following the war, he put together shows in the Catskills' "Borscht Belt", also doing warm-ups for the headline performers.

In the late 1940s and early 1950s, he worked in public relations and as a song plugger, helping to promote tunes like Bob Merrill's "How Much Is That Doggie In The Window." From there, he worked as a radio producer and co-host at WMCA (and briefly thereafter at WMGM), working with personalities such as Laraine Day on the late night interview program "Day At Night" and with Eva Gabor. At the same time, he was doing promotion for several baseball players, including Mickey Mantle and Willie Mays, and his radio beginnings may be attributable to his connection with the New York Giants, whose manager, Leo Durocher, was the husband of Laraine Day. His work on those shows earned him his own late-night show that often featured his wife as co-host, as was popular at the time. For a while in the 1950s he was president of the National Conference of Disk Jockeys.

Larry Kane (born Lawrence Kanowitz in October 21, 1942) is an American journalist best known as the only American reporter whom The Beatles let travel with them on their 1964 and 1965 North American tours. Kane authored a book about his experiences on the tour, called Ticket to Ride, and Lennon Revealed, a New York Times and Los Angeles Times best-seller in 2005. The Emmy Award-winning newsman was honored by the Mid-Atlantic Emmy organization with their Governor’s Award in 2005, recognizing Lifetime Achievement, and was installed in the Pennsylvania Broadcaster’s Hall of Fame.

Kane was born in Brooklyn, New York to Jewish-American parents as Lawrence Kanowitz. He changed his name as an adult, began his career in broadcast journalism in Miami, Florida, first at WQAM and later at WAME and WFUN. While working at WAME, Kane became the first U.S. news correspondent to break the story of the Bay of Pigs invasion of Cuba in 1961.

During the 1960s he was a resident of Haddon Township, New Jersey.

John Winston Ono Lennon, MBE (9 October 1940 – 8 December 1980) was an English musician and singer-songwriter who rose to worldwide fame as one of the founder members of The Beatles, one of the most commercially successful and critically acclaimed acts in the history of popular music. Together with Paul McCartney, he formed one of the most celebrated songwriting partnerships of the 20th century.

Born and raised in Liverpool, Lennon became involved as a teenager in the skiffle craze; his first band, The Quarrymen, evolved into The Beatles in 1960. As the group disintegrated towards the end of the decade, Lennon embarked on a solo career that produced the critically acclaimed albums John Lennon/Plastic Ono Band and Imagine, and iconic songs such as "Give Peace a Chance" and "Imagine". After his marriage to Yoko Ono in 1969, he changed his name to John Ono Lennon. Lennon disengaged himself from the music business in 1975 to devote time to raising his infant son Sean, but re-emerged with Ono in 1980 with the new album Double Fantasy. He was murdered three weeks after its release.

Sid Bernstein (born August 12, 1918) is an American music producer and promoter. Bernstein changed the American music scene in the 1960s by bringing The Rolling Stones, Herman's Hermits, The Moody Blues, The Kinks and The Beatles to America. He was the first impresario to organize rock concerts at sports stadiums.

Sid Bernstein was born in New York City in 1918. During World War II, he served in France.

Bernstein helped start the British Invasion by bringing The Beatles over to the United States from Britain. They played at Carnegie Hall after their appearance on the Ed Sullivan Show. Bernstein also booked them at Shea Stadium, a concert that Bernstein described as "inaudible." During the Beatles Shea concert, Bernstein had the phrase "The Rascals are coming!" displayed on the Shea Stadium scoreboard. "I had met the Rascals in the summer of '65; I put their name up on the scoreboard (at Shea) - 'The Rascals are coming! The Rascals are coming!' A lot of people who hadn't seen pictures of them thought they were a black group. I sensed something big about them."